My guess is the package hasn't been updated to PLT 4. However, the
for macros in PLT Scheme 4 makes this package fairly redundant. See:
http://docs.plt-scheme.org/guide/for.html
> then hit 'Run' I got some error message about modules or something.
Including the full error message in future will allow others to give
better help.
> So, I switched language=Module and tried again. This time I got:
>> Welcome to DrScheme, version 4.0.0.1-svn13jun2008 [3m].
> Language: Advanced Student custom.
This line suggests you switched to "Advanced Student" instead.
N.